Pneumatic pump.



1. Wi. SWMSTROM.

PNEUMATIC PUMP.

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APPLICATION FILED AUG.2. 1913. RENEWED SEPT.21| 1916.

Lmfi Patented Jan.23,1917.

4 SHEETS-SHEET 2.

l. M. svvANsTRon/l.

PNEUMATIC PUMP. APPLICATION FILED AUG.2. 1913- RENEWED SEPT. 21 I9|6.

w'o msnm Jan. 23,1917.

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PNEUMAUCPUMP.

APPLICATION FILED AUG. 2. ISIS. RENEWED SEPT. 2l. 1916.

Patentd Jan. 23, 1917.

4 SHEETS-SHEET 4.

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o 94 I9/ /2 938588 I JOHN M. SWAN'STROM, OF CHCAG, LLINOS.

PNEUMATIC PUMP.

Specification of Letters Patent.

Patented Jan. 23, 1931?..

Application filed August 2, 1913, Serial No. 782,732. Renewed September21, 1916. Serial No. 121,510.

To all whom it may concern.'

Be it known that I, JOHN M. SwANsTRoM, a citizen of the United States,residing at Chicago. in the county of Cook, State of illinois,haveinvented certain new and useful Improvements in Pneumatic Pumps, ofwhich the following is a description, reference being had to theaccompanying drawings, forming a part hereof.

My invention relates to devices for raising water by the action ofcompressed air sometimes known as pneumatic pumps and it has for itsobject to simplify the construction of such devices, to relieve strainon working parts and to protect the working parts against clogging orinjury more effectively than has heretofore been done.

`With these ana other objects hereinafter described in view my inventionconsists in the construction and combination of parts hereinafter setforth and particularly pointed out in the claims.

Referring to the drawings: Figure 1 is a vertical sectional view throughthe center of the left hand water chamber shown in Fig. 2. Fig. 2 is avertical sectional view on a line passing through the centers of the twowater chambers. Fig. 3 is a vertical sectional view on the same plane asFig. 2 showing the operating mechanism on an enlarged scale. Fig.y 4 isa top plan view partly in section, of the casting at the upper end ofthe water chamber. Fig. 5 is a top plan view of the operating lever andthe frame which carries it. Fig. 6 is a bottom plan view of the framewhich carries the operating lever. Fig. 7 is a vertical sectional viewon line a.-a of Fig. 5; and Fig. 8 is a vertical sectional view on lineb-b of Fig. 4.

Referring to the drawings 1 and 2 are respectively the left hand andright hand water chambers of the device, each comprising a cylinderhaving a head casting 3 at their upper ends and a bottom casting 4 attheir lower ends. The head casting 3 has groove 5 formed in its edge toreceive the upper edges of the cylinders 1 and 2 and the bottom casting4 has similar grooves 6 to receive the lower edges of the cylinders. Theupper and lower castings are secured together by rods 7 secured at theirupper ends in openings 8 in lugs 9 on the head casting and secured. attheir lower ends in similar lugs 10 on the bottom casting.

- The bottom casting 4 is formed with inlet opening 11 preferablyprotected Vby screen 12 and, concentric with each cylinder, the castinghas an opening 13 in which is arranged an inwardly passage 15 connectsthe inlet 11 with the water chamber 16 beneath the valve. passage 17leads from the interior ofeach of the cylinders to the outlet 18 whichis provided with a check valve 19 and has con- 65 nected with itdelivery pipe 20.

The head casting 3 has a depending flange 21 and between the cylinders 1and 2 has a downward projection 22. Above this projection 22 on theupper casting is formed an upward extension 23 having formed thereinvalve chambers 24 and 25. Through the walls of the projection 22 areformed openings 26 and 27 communicating respectively with the water 7 5chamber 1 and valve chamber 24, and with the water chamber 2 and valvechamber 25. Valve seats 28 and 30 are formed in the bottoms 0f the valvechambers 24 and 25 respectively and through these passages and 31 leadfrom the valve chambers 24 and 25 to passage 31 which leads tothe airsupply pipe (not shown). In the upper ends of the valve chambers 24 and25 are fitted rings 32 and 33 respectively holding g5 in place belowthem packing rings 34 and 35 respectively.

Over the top of the extension 23 is secured a cover plate 36 which ishollowed out on its under side and has sage 37 for an air outlet to theouter end yof which is preferably secured air discharge pipe 38.

Within the valve chambers 24 and 25 are arranged valves 39 and 40 ofwhich the 95 valve 39 is adapted when in raised position to seat at itsupper end against packing ring 34 and when in depressed position to seatat its lower end against valve seat 28 and similarly when the valve 40is in raised 100 position it seats at its upper end against packing ring35 and when in depressed position it seats at its lower end againstvalve seat 30.

The valve chambers 24 and 25 are, in cross 105 section, roughlytriangular as shown in Fig. 4 with suiiicient bearing surfaces formed onthe arc of a circle to guide the valves in their up and down movement sothat the air can pass valve from the water chamber when the valve .is indepressed position, and out opening valve 14. A

face of the head formed therein a pas- 9o freely about the fio .throughthe opening in packing ring 34er 35, as the case may4 be, through thepassage y37 to the air outlet.

The valves 39 and 40 each consists of an outer cylinder 41 closed at itsupper end and having about its upper end a raised portion 42 adapted toseat against the packing ring 34 or 35. Fitting within this cylinder 41is a cylinder 43 closed at 1ts lower end and provided on the outer faceof its end with a rim 44 within which 1s held a packingl disk 45. Thecylinder 43 at its upper edge has an out-turned flange 46 bearing at itsperiphery against the interior of cylinder 41. A collar 47 screwthreadedinto the lower end of cylinder 43 serves as an abutment for the flange46. A. spring 48 within the cylinder 43 bears at one end against thehead of cylinder 41 and at the other end bears against the head ofcylinder 43 and serves to press them yieldingly apart.

When the valve is free to move upward the pressure of the air throughpassage 29 or 31 will lift the valve from valve seat 28 or 30 and thespring 48 will cause the head ot' cylinder 41 to be quickly brought incon-l tact with the packing ring 34 or 35 closing the outlet for theair, the valve being held in this position until forcibly displaced.

Forward of the valve chambers 24 and 25 are check valve chambers 50 and51 closed at their upper ends by plugs 52 and 53. Concentric with thesevalve chambers are openings 54 and 55 extending through the top casting.Into these openings within the water chambers 1 and 2 are inserted tubes56 and 57 having valve seats 58 and 59 near their upper ends to receivelong stemmed valves 60 and 61. The stem of valve 60 is pivoted at itslower end to a lever 62 which is fulcrumed in a bracket 63 carried atthe lower end of tube 56. To the other end of lever 62 is connected alink 64, the lower end of which is connected to a lever 65 which isfulcrumed on a rod 66 extending downward from the top casting. To theother end of this lever 65 is pivotally connected a float 67.. Themechanism connected withthe ,valve 6l is the same as that abovedescribed as connected with the valve 60.

In the bottoms: of the check valve chambers are formed valve seats 68and 69 about the openings 54 and 55. Check valves 70 and 71 havingcentral projections 72 andv 73 on their upper ends and downwardlyextending stems 74 and 75 non-circular in cross section on their lowerends are arranged in the check valve chambers 50 and 51. In the walls ofthe check valve chambers 50 and 51 near their upper ends are phragms 91and 92. The upper end of the air tubes 82 and 83 extend through openingsin the lower plate 85 and the sheet of lexible material intocommunication with passages 93 and 94 formed in the upper plate 88 andwhich lead respectively into the concavities 89 and `90.

The low-er plate 85 has concentric with the concavities 86 and 78downwardly extending hollow projections 95 and 96 having openings 97 and98 in their lower ends. Through these openings extend stems 100 and 101to the upper ends of which are secured disks 102and 103. Surrounding andcarried by the stems 100 and 101 are cylinders 104 and 105 which fit andslide vertically in the interior of the hollow projections 95 and 96.Springs 107 and 108 bear at one end against the inside of the end ofprojections 95 and 96 and at the other end bear vagainst the inside ofthe head of cylinders 104 and 105 and serve to press the disks 102 and103 upward.

The cover plate 36 is provided with laterally extending arms 110 and 111and with lug 112 midway between these arms. To lug 112 are pivoted by apin 113 two levers 114 and 115, the central portion of the lever 114being formed inverted U-shape in cross section and the lever 115 beinginclosed between the sides of the inverted U. In the ends of lever 114are carried rollers 116 and 117 in the path of movement of the stems 100and 101. Against the pins 118 and 119 on which rollers 116 and 117 aremounted to rotate bear heads 120 and 121 of tubes 122 and 123 into whichextend rods 124 and 125 having at their outer ends heads 126 and 127which are adapted to bear against cylindrical pins 128 and 129 carriedby upwardly extending lugs 130 and 131 on the arms 110 and-,111. Springs132 and 133 bear at opposite ends against the heads 120 and 126, and 121and 127 respectively.

The lower lever 115 is so formed that its upper edge is not in contactwith the under face of the top of lever 114 so that it will not movewith lever 114 When the latter begins to move in either direction but assoon as the under face of lever 114 comes against the upper face oflever 115 will force the latter to move with it.

In the ends of lever- 115 are mounted rollers 134 and 135. These rollersare arranged to bear against the upper ends of rods 136 and 137 whichare mounted to slide vertically in openings in the top plate 36 and bearat their lower ends against the heads of cylinders 41 of the valves 39and 40.

1n the operation of the device above described the parts being in theposition in which they are shown in Figs. 1, 2 and 3, water chamber 1being filled with water to, or nearly to,-the top casting, the valve 39is lifted from the valve seat 28 and air under pressure enters throughthe passage 29 and openings 26 into the upper end of water chamber 1forcing the water through passage 18 into discharge pipe 20 liftingcheck valve 19. While this is going on water chamber 2 is filling withwater through the inlet at the bottom, the valve 14 lifting to permitthe water to enter, the valve 40 being, as shown, in depressed positionbeing held down by the pressure of the roller 135 of lever 115 on therod 137 which in turn bears against the head of cylinder 41 holding thehead of cylinder 43 against valve seat 30 shutting off the air supplyand at the same time holding the head of cylinder 41 away from packingring 35 so that the air in chamber 2 may escape freely.

When the water in water chamber 1 has been so far discharged that thefloat 67 drops, the valve 60 will be drawn down and air under pressurefrom the water chamber will pass through the opening 54, passage 78,opening 80, air tube 82 and passage 93 and, acting against the upperface of the diaphragm 91, will force it downward. rlhis forces the disk102 downward and causes its stem 100 to force the left hand end of thelever 114 downward. As soon as the inner face of the inverted U shapedportion of this lever strikes the upper face of lever 115 it carries itdownward with it causing its roller 134 to act upon the upper end of rod136 to cause its lower end to press the head of cylinder 41 downwarduntil the head of cylinder 43 is pressed against valve seat 28 shuttingoff the air' supply and at the same time as the head of cylinder 41 `isforced away from packing ring 34 the air above the diaphragm 91 isallowed to escape through passage 93, air tube 82, opening 80, assage78, opening 54, past the check valve O, through opening 76, throughvalve chamber 23 out to the air discharge, so that the diaphragm 91almost instantly collapses upward and permits the disk 102 and its stem100 to be lifted by spring 107. The check valve 70 prevents any airpressure from passing back into the water cylinder 1.

rlhe movement of the levers 114 and 115 as above described relieves therod 137 from pressure and permits the valve 40 to be lifted by the airpressure to cause the upper end of its cylinder 41 to seat against thepacking ring 35 thus closing the air outlet. This operation continues solong as the air pressure is kept up the dropping of the float in one airchamber as the water 1s forced out of it by the air pressure, causingthe levers 114 and 115 to be operated to shut od the air supply from onecylinder and turn it on to the other cylinder. The springs 132 and 133serve to carry the lever 114 and with it the lever 115 to the limit oftheir movement and to hold the levers in position until by the action ofthe diaphragms they are again moved. rThese springs acting in oppositedirections on the lever 114 relieve the pivot 113 of strain.

By arranging the levers 114 and 115 so that the lever 114 moves anappreciable distance before causing the lever 115 to strike the rod 136the effect of a quick blow is produced upon the valve causing it to actquickly to shut off the inflow of air and open the outlet. ln this wayescape of air is prevented which might happen by a slow movement of thevalve. So also with the valve which is to be permitted to rise. By thequick movement given to the lever 115 the pressure on the valve isinstantly released and the air pressure instantly raises the valvebringing its upper edge against the packing ring, this quick actionbeing aided by the action of the spring in the valve.

At the instant at which lever 114 in its downward movement comes incontact with lever 115 it is nearly horizontal and as it continues itsmovement passing the horizontal plane of the axis of its pivot thesprings 132 and 133 act to insure quick and positive movement. Thesprings 132 and 133 act in opposite directions and at the time the lever114 is on the horizontal plane of the axis, by reason of this opposingaction of the springs, there is no strain on the pivot of the lever andat other times the strain on vthe pivot is diminished. The springs'132and 133 are of such strength that they hold the lever 115 and with itthe lever 114 in the positions to which it is thrown by the action ofeither diaphragm and thus hold the valve which has been depressed firmlyagainst its valve seat against the force of the air pressure thuscompletely shutting off the supply of air when the valve is down.

The concavities 86 and 87 of the lower plate of the diaphragmchambersare provided with openings as shown to permit the water in which thedevice is submerged in use to pass freely in and out as the diaphragmsmove up and down so as to permit them to move freely. rli`he upper plate88 is imperforate and protects the diaphragms and to some extent theother working parts from any hard substance falling from above whichmight injure or clog these parts.

lt will of course be understood that the device may be used for raisingother liquids than water and of course gaseous substances other than airmay be used as the operating means. i

It will be further understood that I do not desire to be limited to theprecise construction or arrangement shown as it is obvious that manychanges in details of construction and arrangement may be made withoutdey parting from the spirit of the invention.

Having thus described my invention what I claim is :h

1.In a device for raising water by compressed air, a water chamberhaving an air inlet opening in its u; per end, a valve adapted to closethe air inlet opening against the air supply pressure, means operated bythe air pressure within the water chamber for causing the valve to closethe air inlet opening against the air supply pressure, and meansindependentJ of the valve closing means for holding the valve in closedposition. 2. In a device for raising water by compressed air, a waterchamber having an air inlet opening in its upper end, an inwardlyopening valve adapted to close the air inlet opening against the airsupply pressure,

means operated bythe air pressure within the water chamber for causingthe valve to close the air inletopening against the air supply pressure,means independent of the valve closing means for holding the valve inclosed position, and means also operated by air pressure for releasingthe valve..

3. In a device for raising water by compressed air, two water chambersarranged side by side, each having an air inlet in its upper end, avalve for closing each air inlet opening against the air supplypressure, a lever pivoted between the air inlet openings, and meansoperated'by the lever for causing the valve to close the air inletopenings against the air supply pressure alternately, means for swingingthe lever past its dead center and resilient means arranged to swing thelever to position to cause it to effect the closing of a valve.

4. In a device for raising water by compressed air, water chambersarranged side by side, each having an air inlet opening in its upperend, valves adapted to close the air inlet openings against the airsupply pressure, a lever pivoted betweenthe air inlet openings and meansoperated by the lever for causing the valve to close the air inlets ofthe chambers against the air supply pressure alternately, means forswinging the lever past its dead center, and resilient means arranged toswing the lever to position to cause it to effect the closing of avalve, comprising a resilient device having one end in engagement withthe lever and the other end in the plane of the pivot of the lever.

5. In a device for raising water by compressed air, two water chambersarranged side by side, each having an air inlet opening 1n 1t s upperend, a valve for closing each air inlet opening :against the air supplypressure, a leverpivoted between the air inlet openings and meansoperated by the lever for causing the valves to close the air inlets ofthe two water chambers against the air supply pressure alternately,means for swinging the lever, and a resilient device bearing` at one endagainst the lever and having its other end arranged inline with thepivot of the lever.

G. In a device for raising water by compressed air, two water chambersarranged side by side, each having an air inlet opening in its upperend, a valve for closing each air inlet, a lever pivoted between the airinlet openings and means operated by the lever for causing the valves toclose the air inlets of the two water chambers alternately, means for,swinging the lever, resilient devices each bearing at one end againstan end of the lever and having their other ends in the plane of thepivot of the lever.

7. In a device for raising water by compressed air, two water chambersarranged side by side, each having an air inlet opening at its upperend, an inwardly opening valve for each air inlet opening, a lever`pivoted between the two air inlet openings, means operated by the leverfor causing the valves to close the air inlets of. the two waterchambers alternately against the air pressure, means `for swinging thelever and a. spring for holding the lever in position to hold one or theother of the valves in closed position.

f8. In a device for raising water by compressed air, two water chambersarranged side by side each having an air inlet opening in its upper end,each controlled by a valve, a lever pivoted between the air inletopenings, means operated by the lever for causing the valves to closethe air inlet openings of the two water chambers alternately, a secondlever above the first lever pivoted on the same axis therewith andhaving its under surface spaced apart from the upper surface of thefirst lever, and means for swinging the second lever to cause it toeffeet the swinging of the iirst lever.

9. In a device for raising water by compressed air, two water chambersarranged side by side, each having an air inlet opening in its upperend,each controlled by a valve, a lever pivoted between the air inletopenings, means operated by the lever for causing the valves to closethe air inlet opening of the two water chambers alternately, a secondlever above the iirst lever pivoted on the same aXis therewith andhaving its under surface spaced apart from the upper surface of thefirst lever, and means for swinging the second lever to cause it to'Laisser eifect the swinging of the first lever, and means connected withthe second lever for holding it in the position to which it is swung.

10. ln a device for raising water by compressed air, two water chamberseach having a lwater inlet at its lower end and each. having a valvechamber at its upper end communicating with the water chamber, an airinlet and an air outlet leading from each valve chamber, a valve in eachvalve cham ber adapted when in one position to close the air inlet andwhen in its other yposition to close the air outlet, and means foralternately moving the valves into position to close the air inletleading to their valve chambers comprising a lever pivoted between thechambers.

11. ln a device for raising water by compressed air, two water chamberseach having a water inlet at its lower end and each having a valvechamber at its upper endv communicating with the water chamber, an airinlet and an air outlet leading from each valve chamber, a valve in eachvalve chamber adapted when in one position to close the air inlet andwhen in its other position to .close the air outlet, and means foralternately moving the valves into position to close the airrinletleading to their valve chambers, `comprising a lever pivoted on a linebetween the valve chambers, rods arranged to be. operated by the lever,and means for operating the lever.l

12. In a device for raising water byv compressed air, comprising twowater chambers each having an air inlet and valve therefor at its upperend, operating rods for the valves, a lever arranged 'to bearat its endsagainst the op- "erating rods, a second lever pivoted .on the same axiswith the first lever and arranged to bear thereon, and means forswingingthe second lever on its pivot.

13. In a device for raising water'bycom-I pressed air, comprising -twowater chambers each having an air inlet and valve therefor at4 ,itsupper end, operating rods for the valves, a lever pivoted between thelevers arranged to bear at its ends against, the operating-rods, a`second lever pivoted between the levers pivoted on the Same axis withthe first lever and arranged to bear thereon, and means operated by theair pressure for swinging the second lever on its pivot.

14. In a device for raising water by compressed air, comprising twowater chambers each having an air inlet and valve therefor at its upperend, operating rods for the valves, a lever pivoted between the leversarranged to bear at its ends against the operating rods, a second leverpivoted on the same aXis with' the rst lever and arranged to bearthereon, and means operated by the air pressure controlled by floatswithin the water chambers for swinging the second lever on its pivot. f

15. ln a device for raising water by compressed air, two water chamberseach hav` ing an air inlet and valve therefor at its upper end,operating rods for the valves, a lever pivoted between the operatingrods arranged to bear at its ends against the operating rods, a secondlever pivoted on the same aXis as the first lever arranged to bearthereon `but to be capable of initial movement without moving the firstlever, and -means for swinging the second lever on its pivot.

16. In a device for raising water by compressed air, two water chamberseach having an air inlet and valve therefor at its upper end, a leverfor operating the valves, van inwardly acting resilient device at eachend of the lever havingfits outer end arranged in line with the axis ofthe lever, and means for swinging the ends of the lever past the line ofthe outer ends of the resilient devices.

17. ln a device for-raising water by compressed air, a water chamberhaving an air inlet, a valve adapted to close the air/inlet 'against theair pressure, means operated by air 'pressure to close the air inlet,and independent means forholding the valve closed.

rlhis vspecification signed and witnessed this 15th day of August, A. D.1912.

Clans. BROWNING, RALPH N. WEBSTER.

